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← TechnologyWhich outcome occurs when a long three-phase transmission line's open circuit voltage significantly exceeds the sending end voltage?
A)Ferranti effect causing voltage rise✓
B)Skin effect increasing line impedance
C)Corona discharge generating radio interference
D)Proximity effect reducing current capacity
💡 Explanation
When a long transmission line is open circuited, the Ferranti effect occurs because line capacitance charges with minimal reactance, causing voltage to rise at the receiving end. Therefore, a voltage rise results, rather than an increase in line impedance, radio interference or a reduced current capacity that would need other triggering factors.
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